code: def test_base_url_affects_metadata_extra_css_urls(
      app_client_base_url_prefix,
  ):
      html = app_client_base_url_prefix.get("/").text
      assert (
          '<link rel="stylesheet" href="/prefix/static/extra-css-urls.css">'
          in html
      )
  
imports: from bs4 import BeautifulSoup
  from datasette.utils import allowed_pragmas
  from .fixtures import app_client, app_client_base_url_prefix, app_client_shorter_time_limit, app_client_two_attached_databases, make_app_client, METADATA
  from .utils import assert_footer_links, inner_html
  import copy
  import json
  import pathlib
  import pytest
  import re
  import urllib.parse
label_desc: Use image node_id 18 for calling a global function with example usage: test_base_url_affects_metadata_extra_css_urls(app_client_base_url_prefix) without return types